需要在C#中返回多行SQL数据。

using System;
using System.Data;
using System.Data.SqlClient;

public class Program
{
    public static void Main()
    {
        string connectionString = "YourConnectionString"; // 替换为你的数据库连接字符串

        using (SqlConnection connection = new SqlConnection(connectionString))
        {
            string sqlQuery = "SELECT * FROM YourTable"; // 替换为你的SQL查询语句

            SqlCommand command = new SqlCommand(sqlQuery, connection);
            connection.Open();

            SqlDataReader reader = command.ExecuteReader();

            while (reader.Read())
            {
                // 读取每一行数据
                int id = (int)reader["ID"]; // 替换为你的表中的列名
                string name = (string)reader["Name"]; // 替换为你的表中的列名

                // 处理数据...
                Console.WriteLine("ID: " + id + ", Name: " + name);
            }

            reader.Close();
        }
    }
}